CN102083624A - Innerliner with EVA copolymer - Google Patents

Innerliner with EVA copolymer Download PDF

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Publication number
CN102083624A
CN102083624A CN2009801194001A CN200980119400A CN102083624A CN 102083624 A CN102083624 A CN 102083624A CN 2009801194001 A CN2009801194001 A CN 2009801194001A CN 200980119400 A CN200980119400 A CN 200980119400A CN 102083624 A CN102083624 A CN 102083624A
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hdpe
layer
plural layers
crosslinked
density polyethylene
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CN2009801194001A
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Chinese (zh)
Inventor
K·J·居里
R·J·布莱姆伯格
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Alcan Packaging Flexible France SAS
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Alcan Packaging Flexible France SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

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  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
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Abstract

A multilayer film comprises, a cross-linked ethylene copolymer layer such as ethylene vinyl acetate layer, an HDPE layer, and a sealant layer, for use, for example, to form a package for dry food products. The multilayer film has a thickness of less than about 2.0 mils, such as between 1-1.5 mils and a tear strength in the machine direction of greater than 40 grams.

Description

The inner liner of making by ethylene vinyl acetate copolymer
Technical field
The present invention relates to a kind of multi-layered product, concrete, relate to a kind of inner liner, this inner liner is by crosslinked ethylene copolymer, for example, ethene-vinyl acetate copolymer.
Background technology
In order to increase economic efficiency and to increase sustainability, reduce material standard (Downgauging) (minimizing thickness) packing and become a kind of forward position trend.() lining bag box for example, a kind of cereal preparation, biscuit or snacks, the determinant attribute of plastic sheeting inner liner are moisture barrier and mechanical bruise resistance (for example tear and puncture strong change) for being used for dry food product.As the conventional multi-layer film structure of inner liner be, for example, (2-2.5 mil) high density polyethylene (HDPE)/high density polyethylene (HDPE)/sealant.
By high resistant impenetrability high density polyethylene (HDPE) (HDPE) resin (for example SURPASS of Novartis Co.,Ltd) of use recent findings, the hindering factor that can need with relatively thin high density polyethylene (HDPE) (HDPE) layer (0.6-0.8 mil) realization.Yet under this thickness (having conventional sealant layer) condition, the gained film lacks enough hardness and mechanical bruise resistance.
A kind of method that reduces the plastic package material standard is to be processed into a kind of inflation film or cast film.This film can improve obstruction factor and many key physical performances.Yet, use the film of high density polyethylene (HDPE) (HDPE) base to make this inner liner packing, can become the lower spltty film of stiffness (hardness is weak) through the described film in this processing back.This causes the infringement on the packaging character, especially during described packing is opened wide.
Except the damp-proof layer based on high density polyethylene (HDPE) (HDPE), the inner liner packing may comprise that nylon (perhaps ethylene-vinyl alcohol copolymer (EVOH)) is used for the oxygen protective effect simultaneously.When using blown film process to be prepared, described nylon is frozen in the cooling period first time, follows by high density polyethylene (HDPE) (HDPE).As a result, owing to experienced bigger Volume Changes at high density polyethylene (HDPE) (HDPE) when molten state is transformed into solid state, the serious film curls.A film that curls is difficult to be used on the packaging machine again.
Border high density polyethylene (HDPE) (HDPE) the inner liner film of many high-moistures all has a kind of surperficial high density polyethylene (HDPE) (HDPE) skin, and this causes powders on charging apparatus.These powder mainly are low-molecular-weight high density polyethylene (HDPE) (HDPE).
Summary of the invention
The invention provides a kind of plural layers, this plural layers comprise crosslinked ethylene copolymer, and for example crosslinked ethene-vinyl acetate copolymer is suitable for use as inner liner.
In one aspect of the invention, provide a kind of plural layers, this plural layers comprise a kind of crosslinked ethene-vinyl acetate copolymer (EVA) layer, a kind of high-density polyethylene layer and a kind of sealant layer.The thickness of described plural layers is at least 40 grams less than about 2 mils and the tearing strength on machine direction.In some aspects, the thickness that has of described film in 1 mil between 1.5 mils.Further, described ethene-vinyl acetate copolymer (EVA) layer and described high density polyethylene (HDPE) (HDPE) layer can mix, thereby carry out crosslinked.Further, described ethene-vinyl acetate copolymer (EVA) layer is crosslinked by the electron beam radiation function.
Description of drawings
Fig. 1 has shown the cross section of the multilayer polymeric film that comprises three layers.
Fig. 2 has shown the cross section of the multilayer polymeric film that comprises four layers.
The specific embodiment
The application of one aspect of the present invention design ethene-vinyl acetate copolymer (" EVA ") layer, described ethene-vinyl acetate copolymer (EVA) is undertaken crosslinked by electron beam (E-bundle) radiation.Described crosslinked ethene-vinyl acetate copolymer (" EVA ") is used in a kind of multi-layer film structure, thereby forms for example a kind of inner liner that is used to pack.Except ethene-vinyl acetate copolymer (" EVA "), anyly can be used by the crosslinked ethylene copolymer of E radiation exposure, for example, salts of acrylic acid-ethylene (" EAA ") and ethylene methyl acrylate (" EMA "), but, the situation of ethene-vinyl acetate copolymer (EVA) only is discussed for convenience's sake, here.
The advantage of crosslinked ethene-vinyl acetate copolymer (EVA) comprises, compares than conventional inner liner membrane structure, and ethene-vinyl acetate copolymer (EVA) has the physical property of improvement and has outstanding hear resistance in outer package under very thin size.Described crosslinked ethene-vinyl acetate copolymer (EVA) can both provide mechanical bruise resistance in tearing strength and the strong change of puncture.If crosslinked ethene-vinyl acetate copolymer (EVA) is used externally, he also can provide hear resistance and prevent powder accumulation.
Aspect of the present invention relates in particular to the sandwich construction that comprises ethene-vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) (HDPE)/sealant.With reference to Fig. 1, according to an aspect of the present invention, described three layer multi-layer films 10 comprise layer 12, layer 14 and layer 16, and have following structure, from skin to the internal sealant layer: ethene-vinyl acetate copolymer (EVA) (12)/high density polyethylene (HDPE) (HDPE) (14)/sealant (168).Also ethene-vinyl acetate copolymer (EVA) layer and high density polyethylene (HDPE) (HDPE) layer can be mixed mutually also crosslinked, thereby produce a kind of film that comprises ethene-vinyl acetate copolymer (EVA)-high density polyethylene (HDPE) (HDPE) mixture/sealant.
As used herein, ethene-vinyl acetate copolymer (EVA) is meant ethene-vinyl acetate copolymer, comprising greater than 5% vinylacetate.Described ethene-vinyl acetate copolymer (EVA) is crosslinked, and is especially crosslinked by electron beam (E-bundle) radiation.
As used herein, term high density polyethylene (HDPE) (" HDPE ") is meant ethylene or Alathon, and its density is approximately 0.94 gram/cubic centimetre or bigger.Use multiple catalyst can produce high density polyethylene (HDPE) (HDPE), for example, Ziegler-Natta catalyst and metallocene catalyst.
Suitable high density polyethylene (HDPE) (HDPE) can be buied from chemical company of Novartis, and commodity are called Nova-
Figure BPA00001259319000041
High density polyethylene (HDPE) (HDPE) comprises high density polyethylene (HDPE) and a kind of nucleating agent, thereby realizes moistureproof character and other physical properties.Because the moistureproof character that increases, thin high density polyethylene (HDPE) (HDPE) layer may be used to provide identical moisture transport, and therefore, the high density polyethylene (HDPE) of this structure (HDPE) part can reduce material standard.The thickness of described high density polyethylene (HDPE) (HDPE) layer is approximately, for example, and 0.48 mil.Aspect some, the thickness of high density polyethylene (HDPE) (HDPE) layer is less than 0.3 mil of the present invention.
Other suitable high density polyethylene (HDPE)s (HDPE) are Alathon L5885, and its melt flow index is approximately 0.85 gram/10 minutes, and density is approximately 0.958 gram/cubic centimetre.Alathon L5885 can be from LyondellBasell industrial group, the Houston, and Texas commerce is buied.Other suitable high density polyethylene (HDPE)s (HDPE) are Elite5960G high density polyethylene (HDPE) (HDPE), and its melt flow index is approximately 0.85 gram/10 minutes, and its density is about 0.962 gram/cubic centimetre.Elite 5960G high density polyethylene (HDPE) (HDPE) can be from Dow Chemical, Midland, and state of Michigan commerce is buied.
As used herein, sealant layer makes film form hermetically-sealed construction between its oneself outer surface and other multi-layer film structures, thereby forms the inner liner packing.
Described sealant layer can be heated sealing.Described term used herein " heated sealant " is meant and can seals by the mode of heating or fix, described heating process be by, for example, electric induction, magnetic induction, ultrasonic wave, radio frequency (RF), light or other the energy realize that described other energy can make material connect, merge or sealing.These heat sealability materials are the polymer of thermoplastic film formation normally, be known in this area, and comprise a kind of polymer that contains ionic bond, sarin (Surlyn) for example, LLDPE (LLDPE), comprise the Hi-fax of all density at about 0.95 gram/cubic centimetre, low density polyethylene (LDPE), ethene-vinyl acetate copolymer, polybutene, the polypropylene-base plastics, homopolymers or random copolymer, medium density polyethylene (MDPE), high density polyethylene (HDPE) (HDPE), ultra-low density polyethylene, very low density polyethylene, use for example alkene of metallocene catalysis of single site catalyst, perhaps these mixture of polymers.
Described sealant layer can also comprise the additive that is used for the high speed washing processing, for example slip additive and anti-stick fluidization compound.Further, described sealant layer can comprise that some materials provide the confining bed of the crust of being pruned, for example, any not with the suitable compound of selected sealant material compatibility.The existence of incompatible materials can reduce the intensity that is tightly connected, and requires to open the intensity of force of sealing thereby reduce simultaneously.
Each layer of plural layers can connected piece or adhesive layer adhere to each other.In one embodiment, connector or adhesive layer can be the poly mixing extrudate of a kind of low density polyethylene (LDPE) (LDPE) and ethylene acrylate copolymer (EAA) or the modification of a kind of acid anhydride.In certain embodiments, described connector or adhesive layer comprise linear low density polyethylene (LLDPE) (LLDPE)-based adhesive.Alternatively, described connector or adhesive layer can comprise any at usual other the polymeric binder that uses of plural layers preparation field.
Intercept the words of oxygen (O2) if desired, described ethene-vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) (HDPE)/sealant film can be coated with one deck high barrier dressing, for example, nylon nano composite NANOSEAL, thus array structure is provided down: NANOSEAL (21)/ethene-vinyl acetate copolymer (EVA) (22)/high density polyethylene (HDPE) (HDPE) (24)/sealant (26).This packing can be provided to have the oxygen obstruct or not have asking for instructions of oxygen obstruct, but does not influence manufacture process.
Ethene-vinyl acetate copolymer (EVA) provides extra intensity for sandwich construction of the present invention, arrives less than 2 mils thereby the gained film can be lowered material standard, and for example, about 1 mil arrives about 1.5 mils, usually about 1.2 mils.In addition, in order to save cost, described cutting edge material can be recycled utilization.The material cost that ethene-vinyl acetate copolymer (EVA) is saved can reach 30%.The tearing strength of plural layers is at least 40 grams, and be generally 40 and restrain 200 grams, and, especially 70 restrain 125 grams.
The advantage that reduces as the multi-layer film structure material standard of packing is that described thin film is compared with making the conventional membrane structure as the inner liner packing at present, has more transparent outward appearance.
Compare with using the multi-layer film structure that forms dry food product inner liner packing before, multi-layer film structure of the present invention provides lot of advantages.Further, use the Nova-SURPASS high density polyethylene (HDPE) (HDPE) of Novartis Co.,Ltd that moisture effect is doubled.Because the moisture-proof role that increases, the high density polyethylene (HDPE) of described structure (HDPE) part also can be carried out optimization of material.Can provide a kind of cost more cheap low close layer structure like this.Further, this Nova-SURPASS high density polyethylene (HDPE) (HDPE) product can also be removed curling action, and curling action is the difficult problem that material film runs into when handling on packaging machine.
The embodiment of multi-layer film structure of the present invention can be mixed the film-forming method that extruding or shrend mix known any other of extruding or field of the present invention those of ordinary skill by die mixing extruding, extrusion coating and/or film extrusion lay-up method, gluing compound, blown film and be prepared.In certain embodiments, described thin layer mixes extrusion production by die.In embodiments of the invention, described plural layers are positioned at production period.Being decided to be film on machine direction can increase the tearing strength of machine direction, gives the better hardness of this film and increases barrier properties.Because the die process of standard also can produce some machine directions location when film is extruded, using die to mix extrusion when preparing membrane structure, adding aramid layer can be of value to and improve tearing on the machine direction.
Can improve the moistureproof character and the hardness of film by the described film in location on machine direction.In addition, high density polyethylene (HDPE) (HDPE) layer can be common with nylon layer-extrude.This common extrusion molding is beyond expectation can prevent film being tested machine direction easily after the machine direction position fixing process to tear.Because standard die process also can give the machine direction positioning action during film is extruded, adding nylon layer also can be of value to and improve tearing on the machine direction.
Embodiment
The following examples are explained to embodiment of the present invention, and as mentioned above, these embodiment are also never in any form as limitation of the present invention.
Embodiment 1
Following inner liner can prepare according to description of the invention by extruding the mode of following layer jointly, thereby produces plural layers.Described ethene-vinyl acetate copolymer (EVA) and ethene-vinyl acetate copolymer (EVA)+high density polyethylene (HDPE) (HDPE) comes crosslinked by the radiation of e-bundle:
Ethene-vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) (HDPE)/the contain polymer of ionic bond
Ethene-vinyl acetate copolymer (EVA)/ethene-vinyl acetate copolymer (EVA)+high density polyethylene (HDPE) (HDPE)/the contain polymer of ionic bond
Ethene-vinyl acetate copolymer (EVA)+high density polyethylene (HDPE) (HDPE)/LLDPE (LLDPE) ethene-vinyl acetate copolymer (EVA)/high density polyethylene (HDPE) (HDPE)/LLDPE carried out the machine direction location in 3: 1 to 7: 1
The polymer that contains ionic bond is the general designation of the ethylene acid copolymer of sarin (Surlyn)-part neutralization.Above-mentioned any copolymer can be by nano-coating, thereby a kind of oxygen border is provided.Suitable nano-coating can provide by " NanoSeal " that NanoPack company produces.
Although the present invention is described in detail with reference to concrete embodiment, these descriptions and being not used in are construed as limiting the invention.With reference to the above description of this invention, the different modification of embodiment disclosed herein and the present invention's embodiment as an alternative pair become apparent with the general technical staff of the technical field of the invention.Therefore, can estimate that under the situation that does not break away from marrow of the present invention and scope, the present invention can carry out multiple change, marrow of the present invention and scope are defined by appended claims.

Claims (20)

1. plural layers, comprise a kind of crosslinked ethylene copolymer layer, a kind of high density polyethylene (HDPE) (HDPE) layer and a kind of sealant layer, the thickness that described plural layers have is less than about 2 mils, and the tearing strength that described plural layers show at machine direction is at least 40 grams.
2. plural layers according to claim 1, wherein, described crosslinked ethene ethylene copolymer layer is crosslinked by the electron beam radiation.
3. plural layers according to claim 1, wherein, described ethylene copolymer is ethene-vinyl acetate copolymer, salts of acrylic acid-ethylene or ethylene methyl acrylate.
4. plural layers according to claim 1, wherein, described crosslinked ethylene copolymer layer is a kind of crosslinked ethene-vinyl acetate copolymer layer.
5. plural layers according to claim 4, wherein, described crosslinked ethene-vinyl acetate copolymer film is crosslinked by the electron beam radiation.
6. plural layers according to claim 1, wherein, the thickness of described film is that about 1 mil is to about 1.5 mils.
7. plural layers according to claim 1, wherein, the thickness of described film approximately is 1.2 mils.
8. plural layers according to claim 1 further comprise a kind of oxygen separation layer.
9. plural layers according to claim 1, wherein, described diaphragm type is located by the machine direction positioning action.
10. plural layers according to claim 1 wherein, by mixed ethylene-vinyl acetate copolymer and high density polyethylene (HDPE) (HDPE) before crosslinked, form described crosslinked ethylene copolymer layer and high density polyethylene (HDPE) (HDPE) layer as a kind of individual layer.
11. plural layers according to claim 1, wherein, described high density polyethylene (HDPE) (HDPE) layer is the mixture of ethene-vinyl acetate copolymer and high density polyethylene (HDPE) (HDPE).
12. plural layers according to claim 1 wherein, comprise further that on ethylene copolymer layer a kind of oxygen intercepts coating.
13. plural layers according to claim 1, wherein, described tearing strength approximately be 40 restrain about 200 the gram.
14. plural layers according to claim 1, wherein, described tearing strength be about 70 restrain about 125 the gram.
15. an inner liner packing comprises the described plural layers of claim 1.
16. inner liner packing according to claim 15, wherein, described crosslinked ethylene copolymer layer is the buried layer of packing.
17. inner liner packing according to claim 15, wherein, described crosslinked ethylene copolymer layer is the skin of packing.
18. plural layers comprise a kind of crosslinked ethene-vinyl acetate copolymer layer, a kind of high density polyethylene (HDPE) (HDPE) layer and a kind of sealant layer.
19. plural layers according to claim 18 comprise further that on described ethene-vinyl acetate copolymer layer a kind of oxygen intercepts coating.
20. comprise the inner liner packing of the described plural layers of claim 18.
CN2009801194001A 2008-05-28 2009-05-28 Innerliner with EVA copolymer Pending CN102083624A (en)

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US5650508P 2008-05-28 2008-05-28
US61/056,505 2008-05-28
PCT/US2009/045425 WO2009151963A1 (en) 2008-05-28 2009-05-28 Innerliner with cross-linked eva

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US (1) US20090297814A1 (en)
EP (1) EP2296882A1 (en)
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AU (1) AU2009257767A1 (en)
CA (1) CA2723911A1 (en)
MX (1) MX2010013016A (en)
NZ (1) NZ589375A (en)
WO (1) WO2009151963A1 (en)

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Publication number Priority date Publication date Assignee Title
CN108001002A (en) * 2017-11-30 2018-05-08 上海紫江彩印包装有限公司 Vacuum insulation panel Obstruct membrane polyolefin film, its preparation method, Obstruct membrane and vacuum insulation panel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2468661A1 (en) * 2010-12-23 2012-06-27 Amcor Flexibles Kreuzlingen Ltd. Bag-in-box package

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075156A (en) * 1988-03-15 1991-12-24 Asahi Kasei Kogyo Kabushiki Kaisha Multi-layered crosslinked ethylenic resin film, a process for production thereof and a method of applying said film
US5106688A (en) * 1988-05-20 1992-04-21 W. R. Grace & Co.-Conn. Multi-layer packaging film and process
CN1136291A (en) * 1993-12-01 1996-11-20 美孚石油公司 Oriented HDPE films with skin layers
US5714547A (en) * 1995-08-04 1998-02-03 Inteplast Corporation Polymer blend composition for forming transparent polyethylene film
JPH11227117A (en) * 1997-12-10 1999-08-24 Shin Etsu Polymer Co Ltd Food packaging film
WO2000074929A1 (en) * 1999-06-03 2000-12-14 Printpack Illinois, Inc. Machine direction oriented high molecular weight, high density polyethylene films with enhanced water vapor transmission properties
WO2002100637A2 (en) * 2001-06-12 2002-12-19 Exxonmobil Oil Corporation Method for preparing sealable films with siloxane slip additives

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817821A (en) * 1972-11-08 1974-06-18 Du Pont Laminar packaging film
US4870122A (en) * 1987-09-28 1989-09-26 Mobil Oil Corporation HdPE films with imbalanced biaxial orientation
US4927691A (en) 1987-10-16 1990-05-22 W. R. Grace & Co.-Conn. Implosion resistant films
NZ243109A (en) 1991-07-26 1994-09-27 Grace W R & Co Self-welding packaging film having layers of a self-welding ionomer, ethylene vinyl acetate copolymer, a copolymer of vinylidene chloride and vinyl chloride or methyl acrylate, and a blend of hdpe and ethylene vinyl acetate copolymer
US5562958A (en) * 1991-10-15 1996-10-08 The Dow Chemical Company Packaging and wrapping film
US6403231B1 (en) * 2000-05-12 2002-06-11 Pechiney Emballage Flexible Europe Thermoplastic film structures having improved barrier and mechanical properties
US20040105994A1 (en) * 2002-12-03 2004-06-03 Pang-Chia Lu Thermoplastic film structures with a low melting point outer layer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075156A (en) * 1988-03-15 1991-12-24 Asahi Kasei Kogyo Kabushiki Kaisha Multi-layered crosslinked ethylenic resin film, a process for production thereof and a method of applying said film
US5106688A (en) * 1988-05-20 1992-04-21 W. R. Grace & Co.-Conn. Multi-layer packaging film and process
CN1136291A (en) * 1993-12-01 1996-11-20 美孚石油公司 Oriented HDPE films with skin layers
US5714547A (en) * 1995-08-04 1998-02-03 Inteplast Corporation Polymer blend composition for forming transparent polyethylene film
JPH11227117A (en) * 1997-12-10 1999-08-24 Shin Etsu Polymer Co Ltd Food packaging film
WO2000074929A1 (en) * 1999-06-03 2000-12-14 Printpack Illinois, Inc. Machine direction oriented high molecular weight, high density polyethylene films with enhanced water vapor transmission properties
WO2002100637A2 (en) * 2001-06-12 2002-12-19 Exxonmobil Oil Corporation Method for preparing sealable films with siloxane slip additives

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108001002A (en) * 2017-11-30 2018-05-08 上海紫江彩印包装有限公司 Vacuum insulation panel Obstruct membrane polyolefin film, its preparation method, Obstruct membrane and vacuum insulation panel
CN108001002B (en) * 2017-11-30 2019-11-15 上海紫江彩印包装有限公司 Vacuum insulation panel barrier film polyolefin film, preparation method, barrier film and vacuum insulation panel

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US20090297814A1 (en) 2009-12-03
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CA2723911A1 (en) 2009-12-17
AU2009257767A1 (en) 2009-12-17
WO2009151963A1 (en) 2009-12-17
EP2296882A1 (en) 2011-03-23

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